Alert archive / Illinois / Lake County

Weather alerts in Lake County, Illinois, 2022

133 weather alerts in 2022, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Lake County and its neighbors

Each county as a circle sized by its count in 2022. Tap one for its archive.

Alerts
133
Warnings
31
Watches
20
Advisories
36
Busiest month
July35 alerts
Busiest day
July 23, 202213 alerts

Over time

By month

Warning verification

How often warnings here had a storm report inside them, and how much warning the reports had.

Lake County, 2022

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings141029%2374%33 min
Flash flood warnings3167%5100%84 min

Each office's whole area, 2022

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Chicago, IL: tornado warnings15380%1560%13 min
NWS Chicago, IL: severe thunderstorm warnings14810231%46677%26 min
NWS Chicago, IL: flash flood warnings19858%3379%95 min

An office's figures cover every county it serves, including across state lines.

Verified by the Iowa Environmental Mesonet's Cow, which matches each storm-based warning with the local storm reports inside its polygon while it was in force, within 15 km of its edge: a tornado warning counts as verified on a tornado report, a severe thunderstorm warning on hail of 1 inch or more, a gust of 58 mph or more, or wind damage, a flash flood warning on a flash flood report. The false alarm ratio is the share of warnings with no such report; "inside a warning" is the probability of detection, the share of reports that fell inside one; lead time runs from the warning's issue to each report inside it, counting zero for a report that came first. A warning with no report is not proof nothing happened: reports come from spotters, the public and damage surveys, and are thin where few people live.

The alerts

Every alert, in the order issued. Times are local, Central Time. Each opens its own page with the text, the map, the radar and the sounding.

IssuedProductOfficeLasted
Jan 4, 3:43 AM CSTWinter Weather AdvisoryLOT41 hr
Jan 7, 2:17 PM CSTWinter Weather AdvisoryLOT34 hr
Jan 22, 9:21 AM CSTWinter Weather AdvisoryLOT32 hr
Jan 23, 3:17 PM CSTWinter Weather AdvisoryLOT22 hr
Jan 25, 3:13 AM CSTWind Chill AdvisoryLOT31 hr
Jan 27, 9:13 PM CSTWinter Storm WarningLOT17 hr
Jan 27, 9:13 PM CSTWinter Weather AdvisoryLOT24 hr
Feb 1, 2:38 AM CSTWinter Weather AdvisoryLOT39 hr
Feb 7, 3:00 AM CSTWinter Weather AdvisoryLOT4 hr
Feb 16, 3:04 PM CSTLakeshore Flood AdvisoryLOT39 hr
Feb 16, 9:32 PM CSTAreal Flood AdvisoryLOT12 hr
Feb 17, 9:21 AM CSTAreal Flood AdvisoryLOT3 hr
Feb 17, 3:17 PM CSTMesoscale DiscussionSPC118 min
Feb 18, 3:24 AM CSTWind AdvisoryLOT24 hr
Feb 18, 8:07 PM CSTMesoscale DiscussionSPC3 hr
Feb 18, 8:42 PM CSTSnow Squall WarningLOT63 min
Feb 18, 9:30 PM CSTSnow Squall WarningLOT60 min
Feb 19, 2:08 PM CSTWind AdvisoryLOT25 hr
Feb 21, 2:01 PM CSTFlood WatchLOT22 hr
Feb 22, 2:36 AM CSTWinter Weather AdvisoryLOT16 hr
Feb 23, 2:50 PM CSTWinter Weather AdvisoryLOT39 hr
Mar 5, 3:25 AM CSTWind AdvisoryLOT30 hr
Mar 5, 8:36 PM CSTSevere Thunderstorm WatchSPC5 hr
Mar 5, 10:32 PM CSTMesoscale DiscussionSPC88 min
Mar 5, 10:45 PM CSTSevere Thunderstorm Warning Considerable damage threatLOT60 min
Mar 6, 2:36 PM CSTWinter Weather AdvisoryLOT21 hr
Mar 25, 3:03 AM CDTWind AdvisoryLOT19 hr
Mar 25, 2:18 PM CDTMesoscale DiscussionSPC2 hr
Apr 5, 4:10 AM CDTDense Fog AdvisoryLOT11 hr
Apr 13, 1:48 PM CDTMesoscale DiscussionSPC87 min
Apr 13, 2:08 PM CDTWind AdvisoryLOT21 hr
Apr 13, 4:42 PM CDTSpecial Weather StatementLOT48 min
Apr 14, 10:41 AM CDTHigh Wind WarningLOT8 hr
Apr 24, 12:04 PM CDTSpecial Weather StatementLOT41 min
Apr 25, 3:01 AM CDTFreeze WarningLOT24 hr
Apr 26, 3:20 AM CDTFreeze WarningLOT29 hr
Apr 30, 6:02 PM CDTMesoscale DiscussionSPC118 min
May 20, 7:10 PM CDTMesoscale DiscussionSPC2 hr
May 25, 3:41 AM CDTBeach Hazards StatementLOT17 hr
May 25, 3:37 PM CDTMesoscale DiscussionSPC113 min
May 26, 3:29 PM CDTBeach Hazards StatementLOT37 hr
May 28, 2:59 PM CDTBeach Hazards StatementLOT31 hr
May 31, 3:40 PM CDTMesoscale DiscussionSPC2 hr
Jun 12, 3:37 PM CDTHeat AdvisoryLOT3 days
Jun 13, 5:38 PM CDTMesoscale DiscussionSPC2 hr
Jun 13, 5:46 PM CDTSevere Thunderstorm WarningLOT74 min
Jun 13, 5:51 PM CDTTornado WatchSPC3 hr
Jun 13, 6:40 PM CDTAreal Flood AdvisoryLOT4 hr
Jun 16, 12:12 AM CDTSpecial Weather StatementLOT48 min
Jun 17, 2:18 PM CDTBeach Hazards StatementLOT25 hr
Jun 20, 2:40 PM CDTHeat AdvisoryLOT29 hr
Jul 4, 2:22 PM CDTHeat AdvisoryLOT30 hr
Jul 4, 8:07 PM CDTSevere Thunderstorm WatchSPC7 hr
Jul 4, 9:47 PM CDTMesoscale DiscussionSPC88 min
Jul 4, 10:55 PM CDTSevere Thunderstorm WarningLOT50 min
Jul 4, 11:16 PM CDTSevere Thunderstorm WarningLOT59 min
Jul 4, 11:25 PM CDTMesoscale DiscussionSPC95 min
Jul 4, 11:31 PM CDTAreal Flood AdvisoryLOT6 hr
Jul 4, 11:58 PM CDTSevere Thunderstorm WarningLOT62 min
Jul 5, 12:15 AM CDTFlash Flood WarningLOT5 hr
Jul 5, 3:54 AM CDTFlood WatchLOT23 hr
Jul 5, 3:32 PM CDTMesoscale DiscussionSPC118 min
Jul 5, 4:34 PM CDTSevere Thunderstorm WatchSPC7 hr
Jul 5, 6:29 PM CDTMesoscale DiscussionSPC91 min
Jul 5, 8:41 PM CDTMesoscale DiscussionSPC94 min
Jul 5, 10:24 PM CDTMesoscale DiscussionSPC96 min
Jul 7, 3:44 PM CDTBeach Hazards StatementLOT54 hr
Jul 11, 5:35 PM CDTSpecial Weather StatementLOT25 min
Jul 11, 5:51 PM CDTSpecial Weather StatementLOT24 min
Jul 13, 3:07 AM CDTBeach Hazards StatementLOT24 hr
Jul 21, 5:32 PM CDTMesoscale DiscussionSPC2 hr
Jul 23, 12:33 AM CDTSevere Thunderstorm WarningLOT57 min
Jul 23, 1:06 AM CDTMesoscale DiscussionSPC2 hr
Jul 23, 1:23 AM CDTSevere Thunderstorm WarningLOT52 min
Jul 23, 1:58 AM CDTAreal Flood AdvisoryLOT5 hr
Jul 23, 2:30 AM CDTFlash Flood WarningLOT6 hr
Jul 23, 2:52 AM CDTFlood WatchLOT9 hr
Jul 23, 4:01 AM CDTSevere Thunderstorm WatchSPC8 hr
Jul 23, 5:35 AM CDTFlash Flood Warning Considerable damage threatLOT5 hr
Jul 23, 7:44 AM CDTRiver Flood WarningLOT27 hr
Jul 23, 10:57 AM CDTAreal Flood WarningLOT3 hr
Jul 23, 1:27 PM CDTAreal Flood WarningLOT6 hr
Jul 23, 2:28 PM CDTFlood WatchLOT20 hr
Jul 23, 3:58 PM CDTSevere Thunderstorm WatchSPC7 hr
Jul 24, 12:41 AM CDTSevere Thunderstorm WatchSPC5 hr
Jul 24, 3:10 AM CDTSevere Thunderstorm WarningLOT34 min
Aug 3, 1:13 PM CDTMesoscale DiscussionSPC62 min
Aug 3, 1:25 PM CDTSevere Thunderstorm WarningLOT35 min
Aug 3, 1:25 PM CDTSevere Thunderstorm WatchSPC6 hr
Aug 3, 3:43 PM CDTBeach Hazards StatementLOT32 hr
Aug 7, 5:02 AM CDTFlood WatchLOT29 hr
Aug 7, 3:37 PM CDTBeach Hazards StatementLOT48 hr
Aug 10, 3:39 AM CDTBeach Hazards StatementLOT54 hr
Aug 13, 3:07 PM CDTBeach Hazards StatementLOT43 hr
Aug 25, 4:46 AM CDTBeach Hazards StatementLOT41 hr
Aug 28, 1:09 PM CDTSevere Thunderstorm WatchSPC6 hr
Aug 28, 3:48 PM CDTMesoscale DiscussionSPC87 min
Aug 28, 5:09 PM CDTSpecial Weather StatementLOT51 min
Aug 28, 5:30 PM CDTAreal Flood AdvisoryLOT3 hr
Aug 29, 9:42 AM CDTMesoscale DiscussionSPC2 hr
Aug 29, 10:12 AM CDTSevere Thunderstorm WatchSPC5 hr
Aug 29, 12:14 PM CDTSevere Thunderstorm WarningLOT46 min
Aug 29, 12:53 PM CDTMesoscale DiscussionSPC2 hr
Sep 2, 2:53 PM CDTBeach Hazards StatementLOT67 hr
Sep 10, 4:09 AM CDTBeach Hazards StatementLOT59 hr
Sep 11, 2:38 AM CDTFlood WatchLOT31 hr
Sep 11, 1:34 PM CDTAreal Flood AdvisoryLOT3 hr
Sep 11, 2:19 PM CDTAreal Flood AdvisoryLOT3 hr
Sep 11, 3:38 PM CDTAreal Flood WarningLOT9 hr
Sep 11, 10:01 PM CDTRiver Flood WatchLOT21 days
Sep 20, 12:22 PM CDTBeach Hazards StatementLOT7 hr
Sep 20, 4:54 PM CDTSevere Thunderstorm WatchSPC2 hr
Sep 20, 5:31 PM CDTSevere Thunderstorm WarningLOT59 min
Sep 21, 4:04 AM CDTBeach Hazards StatementLOT48 hr
Sep 24, 3:08 PM CDTBeach Hazards StatementLOT4 days
Sep 25, 6:42 PM CDTSevere Thunderstorm WarningLOT46 min
Oct 7, 3:06 AM CDTFreeze WatchLOT11 hr
Oct 7, 1:59 PM CDTFreeze WarningLOT18 hr
Oct 12, 12:35 PM CDTSevere Thunderstorm WarningLOT55 min
Oct 13, 2:26 PM CDTFreeze WarningLOT13 hr
Nov 4, 3:18 AM CDTWind AdvisoryLOT40 hr
Nov 4, 2:05 PM CDTMesoscale DiscussionSPC115 min
Nov 5, 2:21 AM CDTHigh Wind WarningLOT17 hr
Nov 5, 9:51 AM CDTMesoscale DiscussionSPC114 min
Nov 5, 11:29 AM CDTSevere Thunderstorm WarningLOT63 min
Nov 14, 2:27 PM CSTWinter Weather AdvisoryLOT35 hr
Dec 2, 3:39 AM CSTWind AdvisoryLOT29 hr
Dec 7, 1:02 AM CSTDense Fog AdvisoryLOT9 hr
Dec 8, 1:36 PM CSTWinter Weather AdvisoryLOT23 hr
Dec 19, 2:30 PM CSTWinter Storm WatchLOT44 hr
Dec 21, 10:41 AM CSTWinter Storm WarningLOT3 days
Dec 24, 3:19 AM CSTWinter Weather AdvisoryLOT9 hr
Dec 24, 1:05 PM CSTWind Chill AdvisoryLOT21 hr

By product

Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force nowTornadoes on recordForecastThe radar archive20212023

Sources

National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Warning verification from the Mesonet's Cow. Rebuilt daily.